78669178368 has 640 divisors, whose sum is σ = 254083737600. Its totient is φ = 21366374400.

The previous prime is 78669178363. The next prime is 78669178391. The reversal of 78669178368 is 86387196687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78669178363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 565965243 + ... + 565965381.

It is an arithmetic number, because the mean of its divisors is an integer number (397005840).

Almost surely, 2^78669178368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78669178368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127041868800).

78669178368 is an abundant number, since it is smaller than the sum of its proper divisors (175414559232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78669178368 is a wasteful number, since it uses less digits than its factorization.

78669178368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274 (or 258 counting only the distinct ones).

The product of its digits is 146313216, while the sum is 69.

The spelling of 78669178368 in words is "seventy-eight billion, six hundred sixty-nine million, one hundred seventy-eight thousand, three hundred sixty-eight".